OK, I glanced over before kickoff, it looked empty. If it filled up, great.
I used to sit (before the re-seating) right next to the visitors' section and it appeared to me that UA did not travel as well to this game as other teams that have come to LES in the past. If you saw something else, or if the seats filled with BYU fans, or if 1000 UA fans showed up and cheered their guts out, then I'm wrong and more power to you.